By default, the map shows video (see Configuring a camera in standard map viewing mode) only from cameras that are not on the current layout.

You can enable or disable video from all cameras on the map:

1. Go to Settings → Options → User interface (1–2). 
   
   
2. Choose video display mode on the map (3).
3. Click Apply to save the changes.
4. Reopen the Layout (see Layouts Management).